Search found 12 matches

by b_blanchard@live.com
Fri Jun 03, 2011 8:51 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

Hotwire ignition system?
by b_blanchard@live.com
Thu Jun 02, 2011 8:19 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

Yes, been there a few times. One of the cam bevel drive gears has its mark hidden/masked by the lock tab washer so I am very careful there. I got some understandable cam timing degree wheel numbers on-line that corresponded with what I found on my engine. I have been very careful with ignition ...
by b_blanchard@live.com
Wed Jun 01, 2011 7:23 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

Checked cam timing with the degree wheel and it is right on. In the past it had run a little better on an Amal concentric M1 carb instead of the stock Delorto. Not now it still is erratic and stalls with frequent carb farts. Not really a backfire through the carb but a puff. I am at a loss on what I ...
by b_blanchard@live.com
Sun May 29, 2011 7:51 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

Did not do the petrol test and its all assembled now. The leak down test looked and sounded good even though the seats and valves did not look that great.
I re-checked valve and crank timing marks and they all lined up....sort of. Looks to be a pretty casual affair on Ducati's part. I did not do ...
by b_blanchard@live.com
Fri May 27, 2011 4:59 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

advance is right in the 5-8 degree range.
I am going to set both int and exh. at .005 and see how it goes
by b_blanchard@live.com
Thu May 26, 2011 8:59 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

Started thinking about my half a--ed valve job and decided to double check my valve clearances since it seemed to rum better cold than warm. Exhaust seemed tight. I had set it as a snug .003'. Adjusted to .004". Its much happier than before. Any suggestions for an old motor valve clearance?
by b_blanchard@live.com
Thu May 26, 2011 8:54 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza Cylinder base shim
Replies: 3
Views: 6544

Never mind my NC vs WC question. I figured it out after my coffee kicked in.
Thanks again
by b_blanchard@live.com
Thu May 26, 2011 6:58 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza idle problems
Replies: 11
Views: 13845

250 Monza idle problems

66 Monza with a poor erratic idle and eventual stalling. I can not seem to get idle settings right. puffs through the exhaust and occasional puffs back through the carb. I performed a leak down test and at 80 lbs. had 70 lbs. showing with some ring blow by and a little through the exhaust valve. I ...
by b_blanchard@live.com
Thu May 26, 2011 6:49 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza Cylinder base shim
Replies: 3
Views: 6544

Thanks!
What are NC, and WC?
by b_blanchard@live.com
Wed May 25, 2011 8:18 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza Cylinder base shim
Replies: 3
Views: 6544

250 Monza Cylinder base shim

The 66 250 Monza engine I have came with a metal shim between two gaskets at the base of the cylinder. Is this a modification or stock? If a modification, why? Should I remove it or leave it in place?
Thanks in advance.
I have not measured compression. The engine now runs but is unhappy. It has an ...
by b_blanchard@live.com
Tue May 25, 2010 11:47 am
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza Engine set up questions
Replies: 3
Views: 7560

250 Monza Engine set up questions

That is essentially what I am doing.
I figured out the Cam bevel gear mystery. (question 2) By disassembling the gear drive bearing housing and removing the oil line you can mess up the gear alignment without removing the lock tab and nut from the cam.
As the saying goes, the problem with making ...
by b_blanchard@live.com
Mon May 24, 2010 5:13 pm
Forum: Single Cylinder Bevel Drive Engines > 250, 350 & 450
Topic: 250 Monza Engine set up questions
Replies: 3
Views: 7560

250 Monza Engine set up questions

I am attempting to help my son resurrect a basket 67 250 Monza. The motor was unassembled. Two primary questions.
1. If the bottom end gears alignment dots are lined up is that supposed to be TDC? Someone has made marks on the case and flywheel that correspond with those marks but it is NOT TDC.
2 ...

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